.m-mermaid-viewer {
  .el-image-viewer__img {
    background-color: white;
  }
  .el-card__body {
    position: relative;
    &:hover {
      .zoom-viewer {
        display: block;
      }
    }
  }
  .zoom-viewer {
    position: absolute;
    top: 5px;
    right: 5px;
    display: none;
  }
}